<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div th:fragment="header">
    <h1>欢迎使用</h1><a href="/users">回到首页</a>
</div>
</body>
</html>